相手になんと伝えていいのかわかりません

Your tactics are great for certain circumstances however it is not advisable on other situations.
I recommend that you make more tactics even just a little.

または

I think your tactics, which is great for particular situation, is not enough to deal with other situation because it doesn't have a wide variety.
I recommend that you make more sort of tactics.

一文目を推奨しますが、ご自分でもご確認ください。